Cold rolled sheet or strip steel and a process for production thereof
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United States of America Patent
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-
Aug 18, 1992
Grant Date -
N/A
app pub date -
Jul 18, 1990
filing date -
Jan 29, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In order to produce sheet possessing good forming properties, in particular for rotationally symmetrical deep-drawings, a low-carbon steel containing not more that 0.009% N is alloyed with 0.01 to 0.94% Ti and in certain cases with 0.01 to 0.06% Nb and continuously cast. The plate slabs are heated to a temperature above 1120 degrees Celsius, rolled to obtain a hot strip above the Ar.sub.3 point, and would at 520.+-.100 degrees Celsius. After cold rolling to the desired fine sheet thickness, the steel strip is annealed by recrystallizaiton, skin-passes and made into sheets.
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